全反式视黄酸对体外培养的人体大隐静脉内膜平滑肌细胞增殖与凋亡的影响

目的研究全反式视黄酸(atRA)对体外培养的人体大隐静脉内膜增厚、平滑肌细胞增生与凋亡的影响。方法30小段(1 cm长)人体大隐静脉(HSV),随机分成HSV组、atRA组和对照组(n=10),atRA组和对照组均体外培养14 d。atRA组:培养液中含atRA100μM;对照组:培养液中含同等量无水酒精(atRA溶剂)。对HSV组及培养后的atRA组、对照组标本进行取材固定,M asson染色,免疫组化测定增殖细胞核抗原(PCNA)及TUNEL法检测平滑肌细胞凋亡,计算机图象分析仪测量血管内膜厚度、计算内膜增生指数及细胞增殖和凋亡百分比。结果体外培养人体大隐静脉能产生明显的内膜增生和平滑肌细胞增殖(P<0.05);atRA组内膜厚度、增生指数及PCNA阳性细胞百分数均明显低于对照组(P<0.05)。而凋亡细胞百分数则明显高于对照组(P<0.05)。结论atRA可以抑制体外培养人体大隐静脉内膜增厚及平滑肌细胞增生,促进平滑肌细胞凋亡。     

糖调节受损人群营养干预效果研究

目的探讨社区糖调节受损（IGR）人群的营养干预方法和干预效果。方法选择某社区IGR人群作为干预组（57例）,另一社区IGR人群作为对照组（58例）。对干预组进行6个月的营养干预,并对干预效果进行评估。结果干预组经过营养干预后,空腹血糖、糖耐量、BMI、WHR、胆固醇、甘油三脂及血压的降低程度均高于对照组（P〈0.05）。结论通过营养干预能够有效地改善IGR人群的糖代谢水平及其危险因素。     

急诊中毒快速检验诊断系统的建立

目的建立急诊中毒的快速检验诊断系统。方法运用中毒诊断专家系统、可见紫外分光光度计、气相色谱仪、薄层色谱扫描仪、气相色谱质谱联用仪、原子吸收光谱仪、动物实验和毒品金标筛选试剂盒建立急诊中毒快速检验诊断系统。结果酒精和一氧化碳中毒检验诊断可在20min内完成,诊断准确度达100%。其他中毒检验诊断可在0.5￣2h内完成。太原地区急诊中毒出现顺序为:安眠镇静药类>乙醇>一氧化碳>其他临床药物>杀虫剂>鼠药>亚硝酸盐>毒品。山西省内中毒死亡原因为一氧化碳>毒鼠强>杀虫剂。结论本研究建立的急诊中毒快速检验诊断系统具有快速、简便、准确、适用面广的特点,可应用于急诊中毒的快速检验诊断。     

脑卒中后抑郁的研究现状及治疗进展

脑卒中后抑郁(post stroke depression,PSD)是脑卒中后常见并发症,它延迟神经功能和认知功能恢复,增加病死率,极大地影响了卒中患者的生活质量。目前发病机制仍不清楚,多数学者认为PSD是生物、社会、心理因素共同作用的结果。治疗首选药物治疗,在单一药物治疗欠佳时可加用心理治疗,对于联合治疗无效的重度PSD可选用电惊厥治疗。     

新疆桃仁HPLC-UV指纹图谱研究及在地区分类中的应用

该研究建立了新疆桃仁HPLC-UV指纹图谱测定方法,方法采用Shimadzu Inertsil C₁₈（4.6 mm×250 mm,5 μm）色谱柱,以水-乙腈线性梯度洗脱,流速1.0 mL·min^-1,柱温35 ℃,检测波长210 nm。指纹图谱中的9个色谱峰利用UPLC-Q-TOF-MS得到了指认,对41批样品指纹图谱进行聚类分析（HCA）、偏最小二乘法判别分析（PLS-DA）和相似度分析（SA）,新疆桃仁可分为2类,其中6个成分为分类标志物。所建立指纹图谱方法简便、稳定、可行,可用于新疆桃仁的质量控制及分类。     

E—钙黏附素介导的细胞粘附系统研究进展

目的：系统认识近年来上皮钙黏附素系统的基础、临床研究进展。方法：对上皮钙黏附素复合物的分子结构、功能及其调控因素研究进行综合分析讨论，并重点介绍有关研究结果。结果：上皮钙黏附素系统对粘附和维持组织结构完整性发挥重要作用。调控因素主要包括：基因突变，启动子周围甲基化和酪氨酸磷酸化。黏附复合物的表达和功能障碍会导致细胞间粘附丧失、细胞转化和肿瘤发生。结论：钙黏蛋白－连环素复合物不仅仅是黏附分子，对其深入研究有助于阐明肿瘤发生的早期分子改变以及开发肿瘤防治的新策略。     

Possis Angiojet Rapid Thrombectomy System: A New Device for the Definitive Treatment of Thrombotic Coronary Lesions

The incidence of thrombotic lesions is relatively common, and is associated with increased risk and complications. The optimal approach to the percutaneous treatment of these high risk lesions remains unclear. The Possis Angiojet Rapid Thrombectomy System is a new device designed to remove intravascular thrombus by rheolytic thrombectomy. This article describes the use of the Possis Angiojet on a patient with peri-infarct angina and refractory thrombus in the left anterior descending coronary artery.     

陕西省地震重灾区地方病防治恢复重建工作需求调查

Objective To evaluate the effect of endemic disease prevention in Shaanxi province caused by earthquake and supply a scientific basis for making decision regarding restoration and reconstruction after the earthquake.Methods Forty different drinking water samples were collected respectively from Mianxian county and Chencang district the earthquakes'most severely hit areas in Shaanxi province with drinking-water-borne fluorosis.The contents of fluorine and arsenic in the water was detected by Fluoride ion-selective electrode and hydride generation atomic fluorescence spectrometry,respectively.Two hundreds iodized salt and urine samples were collected from affected household women aged 18-45 in severely hit Ningqiang and Lveyang countie with iodine deficiency disorders.The contents of iodine in the salt was detected by semi-quantitative and of urinary iodine of household women was determined by AsⅢ-Ce4+ catalytic spectrophotometry.Two hundred children aged 7-12 were detected by clinical and X-ray examination from Ningqiang and Lveyang counties of Kashin-Beck disease prevailing areas.Hair and food samples from 20 children were collected.The contents of selenium were determined by 2,3-Diamino naphthalene fluorescence spectrophotometry and of T-2 toxin in the food was detected by ELISA.Results No incidents of serious hydrologieM or geological damage were found.Fluoride content in one of eighty water samples was beyond 1.5 mg/L,accounting for 1.25%;five samples were between 1.0 mg/L and 1.5 mg/L,accounting for 6.25%:the arsenic content of all samples were below 0.01 mg/L;all the salt samples from the home of household aged 18-45 were iodine salt,the median of urine iodine of household wonlen Was 303.03μg/L (21.40-1133.54 μg/L) and 325.21 μg/L(27.61 - 1191.46 μg,/L) in Ningqiang and Lveyang counties, respectively.No clinical and X-ray patients were found in the children aged 7 - 12, the average content of selenium in hair was (0.2638 ± 0.0875)mg/kg; the content of T-2 toxin in the forty food samples was below 100 μg/kg. Conclusions The prevention of the endemic disease in the four counties has been moderately affected by the earthquake, but the situation of endemic disease is stable and there is no evidence of the endemic disease.     

WT-L1与Co(Ⅱ)-L1的光谱表征及催化水解β-内酰胺类抗生素的动力学研究

目的 表征金属β-内酰胺酶(MBL)L1的结构和动力学特性,以其发展MBL的通用型抑制剂.方法 在大肠埃希菌BL21(DE3)中表达并纯化野生型L1(Wild type L1,WT-L1),以SDS-PAGE电泳确认;用EDTA除去WT-L1中的Zn(Ⅱ)离子得Apo-L1,再用Co(Ⅱ)滴定制得Co(Ⅱ)-L1;通过UV-vis,CD及荧光光谱表征WT-L1及Co(Ⅱ)-L1活性中心的结构;采用稳态动力学方法测定WT-L1及Co(Ⅱ)-L1催化3类9种β-内酰胺类抗生素水解反应的酶动力学参数,确定抗生素对L1的稳定性.结果 获得纯化的WT-L1和重组的Co(Ⅱ)-L1;光谱表征表明L1具有两个金属活性中心,Co(Ⅱ)-L1的二级结构发生显著变化;WT-L1对碳青霉烯类抗生素的酶促活性最强,青霉素类次之,头孢类抗生素较弱,Co(Ⅱ)-L1比WT-L1的酶催活性弱.结论 Co(Ⅱ)-L1的重组实现了对MBL-L1的结构表征,L1对青霉素类抗生素呈现强的催化活性,对头孢类抗生素稳定.     

S100B及其对癫痫患者记忆缺失的评估作用

癫痫是一种常见病,尤其多见于青少年和老年人,大多数癫痫患者不同程度地伴有记忆缺失。许多研究表明血清中的S100B在一定程度上可以反映记忆的水平,弥补了目前对记忆评价的不足。本文在介绍S100B基本特性及作用的基础上,着重说明S100B可能用作评价癫痫患者记忆缺失的血液生化指标及作为钙结合蛋白通过钙离子、一氧化氮等在记忆方面作用的机制。